Siblings + immortals and gods + empress, a love spanning three lifetimes
The two are minor immortals from the Celestial Realm who descend to the mortal world to undergo tribulations by a twist of fate.
In their first life, he is a child adopted by her family. In the eyes of others, they are siblings. They love each other but cannot be together. Worse, he is the killer of her father. I would rather leave before you do than watch you disappear from my sight.
In their second life, they ascend to godhood and return to the Celestial Realm, retaining their memories of their previous lives. But the Celestial Realm will not tolerate love. Their immortal bones are stripped away, their immortal bodies destroyed, and their memories erased. They are banished to the mortal world and forbidden from ever returning to the heavens. She risks her life to obtain an elixir for him that preserves his memories. Before the Ascension Platform, she says, "This time, will you be the one to pursue me?"
In their third life, the Star Lord of Fate takes pity on them and chooses a favorable destiny. She becomes an empress, and he becomes the great general who protects her country. After enduring countless hardships, they finally find happiness and make up for the regrets of their past lives.